It brightened rapidly. Now it is very bright as 7.2 mag (Jan. 3, Syogo Utsunomiya). It will approach to the sun down to 0.3 a.u. on Jan. 14. It is not observable at all in the Southern Hemisphere. It will be unobservable soon also in the Northern Hemisphere.

It brightened very rapidly as predicted. Now it is very bright as 6.3 mag (Jan. 6, Maik Meyer). It will approach to the earth down to 0.08 a.u. to the earth in mid February, and it is expected to be observable at 6 mag in good condition. It will be unobservable temporarily in January. Then it keeps observable in good condition after mid February.

Now it is 11.3 mag (Jan. 6, Maik Meyer). It is expected to brighten up to 7 mag in 2017 summer. In the Northern Hemisphere, it keeps observable in good condition until the highlight while the comet will be brightening. In the Southern Hemisphere, it will be observable in spring, but it keeps very low for a while.

Already bright as 11.8 mag (Jan. 1, Thomas Lehmann). It will pass the perihelion on Mar. 10, 2017. In the Northern Hemisphere, it keeps observable in the evening sky until late February while the comet will be brightening up to 8.5 mag. In the Southern Hemisphere, it will appear in the morning sky in late March at 8 mag, then it keeps observable while the comet will be fading.

Now it is 15.5 mag (Dec. 6, Kunihiro Shima). It will brighten up to 12 mag from winter to spring. In the Northern Hemisphere, it keeps observable while the comet is brightening gradually. But it will be unobservable in late February. In the Southern Hemisphere, it keeps observable for a long time after this.

Now it is 15.2 mag (Nov. 17, Ken-ichi Kadota). It will brighten up to 14 mag from winter to spring, and it will be observable in excellent condition in the Northern Hemisphere. It keeps low in the Southern Hemisphere.

Now it is bright as 14.4 mag (Dec. 25, Thomas Lehmann). It will be observable at 11 mag for a long time from 2017 to 2018. Now it is observable in excellent condition in the Southern Hemisphere. But it keeps low for a while in the Northern Hemisphere.

Now it is 15.0 mag (Dec. 6, Kunihiro Shima). It will brighten up to 12-13 mag and will be observable in good condition in 2017 summer. In this winter, it is observable until mid January in the Southern Hemisphere, or until the end of February in the Northern Hemisphere.

It will brighten up to 14 mag from spring to summer in 2017. It locates somewhat low in the Northern Hemisphere. The perihelion distance increased from 2.4 a.u. to 2.9 a.u. in this apparition. So it will not be bright as before.

Now it is 15.8 mag (Dec. 3, Kunihiro Shima). It will brighten up to 14 mag from summer to winter in 2017. Then it will be observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it is hardly observable around the highlight.

It brightened up to 6 mag from last autumn to last winter. Now it is fading. It has already faded down to 15.2 mag (Nov. 2, Yuji Ohshima). It is observable in good condition in the Northern Hemisphere. It is not observable after this in the Southern Hemisphere.

Now it is 17.6 mag (Dec. 30, Yuji Ohshima). It will approach to the earth down to 0.14 a.u. from March to April. It is expected to brighten up to 5-6 mag. It may brighten furthermore in outburst. In the Northern Hemisphere, it keeps observable in excellent condition. In the Southern Hemisphere, it will not be observable for about one month around the highlight. But it keeps observable in good condition except for that period.

It kept bright 12 mag for a long time from autum in 2015 to summer in 2016. Now it is fading. It is appearing in the morning sky in the Northern Hemispehre. It will be observable in late January also in the Southern Hemisphere.

Now it is 17.7 mag (Dec. 17, Ken-ichi Kadota). It will brighten up to 10 mag in summer, and it will be observable in excellent condition in the Southern Hemisphere. It locates low in the Northern Hemisphere.

Now it is 16.5 mag (Dec. 29, Sandor Szabo). It will brighten up to 15 mag and will be observable in good condition from autum to winter in 2017. In the Northern Hemisphere, it keeps observable in good condition for a long time while the comet will be brightening. It is not observable until 2017 summer in the Southern Hemisphere.

Now it is 15.8 mag (Sept. 9, Alexander Baransky). It keeps 16.5 mag from 2016 to 2017. In the Northern Hemisphere, it keeps observable in good condition for a long time, although it becomes low temporarily in December. In the Southern Hemisphere, it will never be observable again.

It brightened up to 15 mag in early 2016. Now it is fading. It has already faded down to 16.3 mag (Dec. 30, Sandor Szabo). In the Northern Hemisphere, it keeps observable in good condition for a long time until 2017 autumn when the comet will be fainter than 18 mag. It will never be observable after this in the Southern Hemisphere.

Now it is 16.9 mag (Nov. 25, Ken-ichi Kadota). It brightened rapidly, and became brighter than originally expected. It keeps 17 mag until 2017. In the Northern Hemisphere, it keeps observable in excellent condition for a long time. It is not observable in the Southern Hemisphere.

It is expected to brighten up to 9 mag in summer in 2018. In the Northern Hemisphere, it keeps observable until 2018 summer while the comet will be brightening. In the Southern Hemisphere, it is hardly observable in 2017, but it will be observable in good condition in 2018.

Now it is 17.8 mag (Dec. 3, Kunihiro Shima). It was observed at 17 mag last winter. It will be observable at 17 mag again next winter. It is observable in good condition in the Northern Hemisphere. But it locates low in the Southern Hemisphere.

It will pass the perihelion in 2019. However, it has not been brightening since the discovery in 2010. Now it is 17.3 mag (Nov. 4, D. Buczynski). It keeps observable in excellent condition in the Northern Hemisphere. It is not observable in the Southern Hemisphere.

It brightened up to 6.2 mag in June (June 24, Marco Goiato). Now it is fading. It has already faded down to 13.3 mag in September (Sept. 28, Chris Wyatt). Now it is appearing in the morning sky. In the Southern Hemisphee, it keeps observable in excellent condition after this. It keeps low in the Northern Hemisphere.

Now it is 17.3 mag (Nov. 9, L. Elenin). It keeps 17 mag for a long time from 2016 autumn to 2017 summer, and it keeps observable good condition all through that period in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable again after this.

Now it is 17.5 mag (Dec. 24, Ken-ichi Kadota). It will brighten up to 16 mag in 2017 summer, but it is not observable around the high light. It is observable at 17-18 mag until March in the Southern Hemisphere, or until April in the Northern Hemisphere.